The couple surprised the world when they announced they were expecting their first child together.

The pair, who are engaged, took to social media to confirm the news by sharing a custom emoji of Blac with her hand on a baby bump.

Chyna and Rob are keeping the gender of the baby a secret for now, but recently shared a scan picture with their fans. "Here I am Engaged to be married to one of the greatest men I know who loves King & I unconditionally AND having another bundle of joy!," she captioned the image.

Olivia Wilde announced the news that she was expecting baby number two in April, by sharing a sweet photo of herself and son Otis. The black-and-white snap shows them both cradling their stomachs, along with the caption: "Matching baby bumps."

The baby will be Olivia's second child with her partner Jason Sudeikis and comes just weeks after the actress admitted she would love to give Otis a little sibling.

There was no hiding Jools Oliver's pregnancy as she stepped out on the red carpet with her husband Jamie in March. The couple are expecting their fifth child together, and have since admitted that the news came as a "shock" to their family.

"This was not expected, I can't even believe I'm saying it," Jamie told The Mirror. "I think my own family were like 'really?!' But we're all tuned in to kids, it's good, it's carnage!"

Megan Fox stunned when she stepped out with a noticeable baby bump at an event in Las Vegas - just months after announcing her split from husband Brian Austin Green. It has since emerged that Brian is indeed the father of the baby, and while Megan's pregnancy was said to come as a surprise, the couple are believed to be "very excited" about welcoming their third child together.

Blake Lively and her husband Ryan Reynolds are said to be "thrilled" to be expecting their second child together. The couple are already parents to daughter James, and have made no secret of their desire to have a big family.

"I knew I wanted to have lots of kids because I had come from a big family so it was always important to me," Blake told Us Weekly. "So it's just the excitement of that finally being here."

Behati Prinsloo and Maroon 5 frontman Adam Levine were said to be "over the moon" after learning that they are expecting their first child together.

The pair had been open about their desire to start a family, with Adam telling KIIS FM radio that they would "definitely" have children in an interview in 2014. "I want to have 100 kids," he said. "I want to have more kids than would be socially responsible."

Nicky Hilton and her husband James Rothschild were "over the moon" to be expecting their first child together in 2016. The couple welcomed their baby girl, Lily Grace Victoria Rothschild in New York at the beginning of July.

Liv Tyler welcomed baby number three - a baby girl named Lula Rose Gardner in July. The Leftovers star revealed in January that she is expecting her second child with fiancé Dave Gardner, with the happy news coming less than a year after they welcomed their son Sailor together. The actress is also a proud mum to son Milo, from her previous marriage to Royston Langdon.

Tracy Beaker and Strictly Come Dancing star Dani Harmer revealed that she was expecting her first child with boyfriend Simon Brough in an exclusive interview with HELLO! magazine.

The actress said she was "over the moon" at the news, and has since welcomed a baby girl - Avarie-Belle Betsy Brough at the end of June.

"Me and Simon are both beyond excited that we're having a little girl," she told HELLO!. "This means I can surround myself with all things pink and girly. I thought it was going to be a girl and I can't believe I was right! Mothers instinct is an actual thing! The whole family is very excited - especially the nannys. She is going to be incredibly spoilt and loved".

Alanis Morrissette found a novel way to announce her second pregnancy - with an animated video of her young family. The Canadian singer welcomed her second child with her husband, rapper Mario "Souleye" Treadway, at the end of June.

They named their baby girl Onyx Solace Morrissette-Treadaway, and said they were "beyond blessed" to have become welcomed another addition to their family.

The couple are already parents to son Ever Imre Morrissette-Treadway, five.

Television presenter Natalie Pinkham welcomed a baby girl with her husband Owain Walbyoff in June. While she has admitted she was surprised to be pregnant again less than a year after the birth of her son Wilf, Natalie says she feels "lucky and blessed" about her growing family.

Kristina Rihanoff stunned viewers when she revealed that she is expecting her first child with partner Ben Cohen on Celebrity Big Brother in January. The former Strictly Come Dancing star opened up about her pregnancy to HELLO!, saying she was "delighted" about becoming a mum.

The couple announced the birth of their "beautiful baby girl" exclusively to HELLO! on 13 July.

Audrina Patridge announced in December that she and her fiancé Corey Bohan were expecting. The former star of The Hills has since debuted her baby bump on Instagram, and said that she doesn't mind if she has a boy or girl. "We just want it to be healthy," she wrote on her blog.

Fresh Prince of Bel Air star had a double whammy of good news as she confirmed she was engaged and expecting her first child with her partner Dr. Vaughn Rasberry.

Speaking to Entertainment Tonight, Tatyana said: "Planning our wedding has been so exciting, but when we found out we were expecting, our perspective shifted completely. We want our ceremony to really celebrate our newest blessing! Plus, I have the best wedding planner, Michael Russo. He's making everything so fun and stress free!"

Mean Girls star Lacey Chabert, who played Gretchen Weiners in the cult film, is expecting her first baby with husband Dave Nehdar. The actress revealed the good news in a fun Instagram post showing her dog in a slogan print top that read: "My mom is having a baby & all I get is this silly shirt."

She told fans: "Kitty doesn't seem as excited about this as we are... I'm so happy to share the good news that my husband and I are expecting a baby later this year! We are thrilled and so thankful for this blessing #pregnant."

Another famous face who welcomed their second child in 2016 was Emily Blunt. She and her husband John Krasinski, who are already parents to two-year-old daughter Hazel, welcomed their second daughter Violet at the end of June.

Hot couple Mila and Ashton Kutcher will welcome their first child before the end of the end, her representative confirmed to HELLO! Online in June. The couple, who tied the knot in July 2015, are already proud parents to 20-month-old daughter Wyatt Isabelle.

"Ashton genuinely lights up when talking about Wyatt and the little one on the way," a source told People. "Everything about being a father is natural to him."

A statement read: "Ronnie & Sally Wood are delighted to announce the birth of their twins Gracie Jane (6lb) & Alice Rose (5.7lb). The girls arrived on 30th May at 10.30pm and all are doing brilliantly. The babies are perfect."

The 68-year-old had previously said he couldn't wait to be a father for the fifth time, and intended to be a hands-on dad when his baby girls arrive.

"I'm going to be changing nappies and all that goes with it," Ronnie told HELLO! "I'm looking forward to all that. I'm unbelievably lucky and incredibly blessed. I love all my kids. I love being a dad and to have this happening is just wonderful. I'm a lucky guy."

Chelsea Clinton had the best early Christmas gift after discovering she was expecting her second baby with husband Marc Mevinsky.

The daughter of Bill and Hillary Clinton welcomed her first son in June and announced the wonderful news on Twitter, while her parents released a statement saying they were "over the moon" at the arrival of their grandson.

Two days later, the new parents posed with the maternal grandparents as they left the hospital with their bundle of joy, Aidan Clinton Mezvinsky.

Giovanna Fletcher welcomed her second child with husband Tom Fletcher on 16 February. TheHELLO! Online blogger had been keeping fans updated throughout her pregnancy and has continued to do so since the birth of her son Buddy Bob, whose birth she announced on social media.

Jaime Winstone welcomed son Raymond Jago Winstone Suckling in February – her first child with boyfriend James Suckling. Speaking exclusively to HELLO! magazine in November, Jaime revealed she has "never been happier" since finding out she was expecting, and said motherhood was her "main calling in life".

Ivanka Trump became a mother-of-three in 2016. The businesswoman, who is married to investor Jared Kushner, revealed the news with a little help from her son and daughter – Arabella, four, and Joseph, two, on Facebook. Her son Theodore James Kushner was born on 27 March.

Kelly Clarkson welcomed a baby brother for her daughter River Rose on 12 April. The Stronger singer, who married husband Brandon Blackstock in 2013, had confessed to having a difficult pregnancy and told the hosts on CBS This Morning that she is "familiar with all-day sickness" while she is expecting.

The couple have named their son Remington Alexander Blackstock, and said they "couldn't be happier or more in love" with their baby boy.

After keeping mum about her pregnancy for several weeks, Anne Hathaway debuted her growing baby bump on the beach in January. The Oscar-winning actress welcomed her first child with husband Adam Shulman on 24 March - a baby boy named Jonathan Rosebanks Shulman.

It emerged in April that Eva Mendes and her long-term partner Ryan Gosling were expecting their second child together. Although the incredibly private pair didn't confirm their happy news, the actress welcomed a sister for their daughter Esmeralda at the end of April, who they named Amada Lee Gosling.

After speaking candidly about their struggles to conceive, Chrissy Teigen and John Legend announced the good news that they were expecting their first child together in October. The couple later revealed that they were expecting a baby girl, with Chrissy picking up some parenting tips from her friend Kim Kardashian as she prepares for motherhood.

Their daughter Luna Simone Stephens was born on 14 April, and Chrissy said she is "so in love" with her daughter.

Princess Sofia and husband Prince Carl-Philip welcomed their first child together, son Alexander, in April. Speaking before the birth, Princess Sofia admitted they were determined not to find out the gender of their upcoming arrival.

"It'll be a surprise," Sofia told a reporter in November. "It feels great."

Crown Princess Victoria introduced her son Prince Oscar to the world in March. The 38-year-old welcomed her second child with husband Prince Daniel, a baby brother for their daughter Princess Estelle. However the three-year-old isn't that excited about becoming a sister according to her mum. "What she really wants is a hamster!" Victoria joked.

James Van Der Beek said he was feeling "ridiculously blessed" after announcing that he and his wife Kimberly are expecting their fourth child together. The couple tied the knot in Israel in 2010 and are already parents to children Olivia, five, Joshua, three, and Annabel, two. They welcomed their baby girl Emilia Van Der Beek on 24 March.

It was revealed in January that Keri Russell was expecting her first child with her co-star boyfriend Matthew Rhys. The couple, who embarked on a romance while filming their spy drama The Americans, finally welcomed their bundle of joy in May.

This is the first child for Matthew 41, and the third for Keri, 40, who has daughter Willa, 4, and son River, 8, with ex-husband Shane Deary.

Doctor Foster actress Suranne Jones announced her pregnancy at the NTAs in January, by showing off her blossoming baby bump on the red carpet. The baby boy arrived at the beginning of March and is Suranne's first child with husband Laurence Akers.

Baby number two arrived on 2 March for actress Morena Baccarin. The 36-year-old, who is already a mother to two-year-old son Julius, welcomed a baby girl called Frances with her Gotham co-star Benjamin McKenzie.

"I want to sleep all day and not be in a dress and heels," the heavily pregnant star said at the Deadpool premiere. "My waters could break right now!"